Human Back Muscles Anatomy Diagram - Labeled Posterior View #184890 (License: Personal Use)

This vintage-style anatomical drawing shows the intricate layering of superficial and deep muscles of the human back, including trapezius, latissimus dorsi, erector spinae, and rotator cuff components. Each muscle group is precisely numbered for identification in educational or clinical contexts. The illustration emphasizes muscle fiber direction, origin/insertion points, and spatial relationships critical for understanding biomechanics and pathology.

Used in medical textbooks, anatomy courses, physical therapy resources, and fitness education to teach muscle structure, function, and common injuries; matches user intent for learning, referencing, or visualizing back anatomy.